on the sidelines

Idioms  

1. Observing rather than taking part, out of the action, as in Bolivia's neighbors remained on the sidelines, waiting to see which faction in the dispute would prevail. This idiom comes from sports. The sidelines are the two lines defining the sides of the court or playing field and the area immediately beyond them where, in such sports as football, the non-playing team members sit. [First half of 1900s]

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Example Sentences

While, for now, he will sit on the sidelines, Damodaran says he would reconsider that posture if the stock drops enough.

From MarketWatch • Jun. 5, 2026

The 2026 gubernatorial primary has been one of the most unpredictable and expensive in decades and a race that was shaped early on by a number of heavyweight Democrats staying on the sidelines.

From Los Angeles Times • Jun. 3, 2026

“Poor affordability is keeping buyers on the sidelines while higher rates make homeowners hesitant to sell outside of demographics and necessity,” TD Bank U.S.

From Barron's • May 26, 2026

Others, like Italy, argue that it's unwise to stay on the sidelines any longer.

From BBC • May 26, 2026

The rest of us stood on the sidelines as the chosen ones laughed and high-fived and hugged each other.

From "Courage to Soar" by Simone Biles